We propose a technique for determining whether mechanically transferable (MT) connectors are flooded. The proposed technique is based on the return loss measurements at several wavelengths using an optical time domain reflectometer (OTDR). We define the effective return loss at the MT connector as the average of the return losses measured at several wavelengths. The effective return loss makes it possible to assess the state of the connector. We demonstrated the feasibility of the proposed technique through proof-of-principle experiments performed in a laboratory. This paper also reports the results of field environments and discusses the applicability of the proposed technique.

我们提出了一种确定机械可转移（MT）连接器是否被淹没的技术。所提出的技术基于使用光时域反射仪（OTDR）在几个波长下的回波损耗测量。我们将MT连接器处的有效回波损耗定义为在多个波长下测得的回波损耗的平均值。有效的回波损耗使评估连接器的状态成为可能。我们通过在实验室中进行的原理验证实验证明了所提出技术的可行性。本文还报告了现场环境的结果，并讨论了所提出技术的适用性。